package org.zuel.boot.demo.component;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.realm.Realm;

import java.util.ArrayList;
import java.util.Collection;

/**
 * @Description:
 * @Author: Athrun
 * @Date: 2019/4/12
 * @Version 1.0
 */
public class CustomizedModularRealmAuthenticator extends ModularRealmAuthenticator {
//自定义识别器
    @Override
    protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken)
            throws AuthenticationException {
        // 判断getRealms()是否返回为空
        assertRealmsConfigured();
        // 强制转换回自定义的CustomizedToken
        LoginToken loginToken = (LoginToken) authenticationToken;
        // 登录类型
        String loginType = loginToken.getLoginType().getType();
        // 所有Realm
        Collection<Realm> realms = getRealms();
        // 登录类型对应的所有Realm
        Collection<Realm> typeRealms = new ArrayList<>();
        for (Realm realm : realms) {
            if (realm.getName().contains(loginType)) {
                typeRealms.add(realm);
            }
        }

        // 判断是单Realm还是多Realm
        if (typeRealms.size() == 1) {
            return doSingleRealmAuthentication(typeRealms.iterator().next(), loginToken);
        } else {
            return doMultiRealmAuthentication(typeRealms, loginToken);
        }
    }
}
